How many electrons are present in a 40Ca2+ species?
A) 40
B) 38
C) 20
D) 18
Correct Answer:
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Q20: Ions of opposite charges attract one another.
Q21: The molecular formula of calcium phosphate is:
A)
Q22: Consider 235U. How many neutrons are present
Q23: The correct molecular formula for iron(II)bromide is:
A)
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A)
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Q27: Which species contains 9 protons?
A) (16O)
B) (19F)
C)
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Q29: Alkali metal cations carry a charge of:
A)
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